A good thing to find out is the extent to which any given platform or distributor licensing to platforms have marketing tools and/or commitments in place. Will doing a deal with them be like having your film in the basement of a crap dvd store in a strip mall in Iowa (no offense to Iowans), or, will it be like having it on the shelves facing out in a big chain with some advertising, or will it be somewhere in between? Not all distributors and aggregators market films well or even at all so choose carefully or have a back-up marketing plan.